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AUSCERT External Security Bulletin Redistribution
ESB-2006.0451 -- [UNIX/Linux]
Memory exhaustion DoS against smbd
17 July 2006
AusCERT Security Bulletin Summary
Product: samba 3.0.1 to 3.0.22 (inclusive)
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact: Denial of Service
CVE Names: CVE-2006-3403
Revision History: July 17 2006: Corrected CVE number
July 11 2006: Initial Release
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== Subject: Memory exhaustion DoS against smbd
== CVE ID#: CAN-2006-1059
== Versions: Samba Samba 3.0.1 - 3.0.22 (inclusive)
== Summary: smbd may allow internal structures
== maintaining state for share connections
== to grow unbounded.
The smbd daemon maintains internal data structures used track
active connections to file and printer shares. In certain
circumstances an attacker may be able to continually increase
the memory usage of an smbd process by issuing a large number
of share connection requests. This defect affects all Samba
A patch for Samba 3.0.1 - 3.0.22 has been posted at
Guidelines for securing Samba hosts are listed at
This security issue discovered during an internal security
audit of the Samba source code by the Samba Team.
== Our Code, Our Bugs, Our Responsibility.
== The Samba Team
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